12201001021 has 8 divisors (see below), whose sum is σ = 13391842464. Its totient is φ = 11023769520.

The previous prime is 12201001013. The next prime is 12201001039. The reversal of 12201001021 is 12010010221.

12201001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12201001021 - 2³ = 12201001013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12201000989 and 12201001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400606 + ... + 3404191.

It is an arithmetic number, because the mean of its divisors is an integer number (1673980308).

Almost surely, 2^12201001021 is an apocalyptic number.

12201001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12201001021 is a deficient number, since it is larger than the sum of its proper divisors (1190841443).

12201001021 is a wasteful number, since it uses less digits than its factorization.

12201001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804971.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12201001021 its reverse (12010010221), we get a palindrome (24211011242).

It can be divided in two parts, 1 and 2201001021, that added together give a palindrome (2201001022).

The spelling of 12201001021 in words is "twelve billion, two hundred one million, one thousand, twenty-one".